Please note that measurements may vary by size
Cotinine can be found in hair for up to 90 days, offering a long-term history of usage
Its small and easy to hide, with a shape thats easy to hold
Given that the weight of 20 cigarette filters is 0.12 ounces (3.4 gm) [11], the estimated discarded waste from U.S
Angela Wright, a colour consultant and author of the Beginner Guide to Colour Psychology, told CNN: 'It makes perfect sense that smoking packets would use a vile green that looks like bodily fluids and makes people feel slightly nauseated.' However, Dr Carolyn Mair, form the London College of Fashion, said she actually quite liked the colour as it reminded her of 'nature'
Ecigarettes come in a variety of forms, and the mix of available products has changed rapidly in recent years